Locking structure, fastener and display equipment
By designing the double-wire thread structure of the locking section and the tapping section in the fastener, tapping and locking are achieved in one tightening operation, solving the problem of thin steel prone to breaking in traditional fastener assembly, simplifying the production process and reducing costs.
Patent Information
- Application Number
- CN202421467115.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-25
AI Technical Summary
In traditional fastener assembly, when metal sheets are connected, the threaded holes are close to the folded edge, and the lower mold forms thin steel at the edge of the give way holes, which is difficult to withstand shear forces, resulting in breakage and frequent mold replacement, increasing production costs.
A fastener is provided, including a locking section and a tapping section. The circumference of the locking section and the tapping section of the fastener are provided with double-line threads. The tapping section gradually converges inward while extending inward, so that the tapping and locking can be completed in one tightening operation to avoid pre-forming flange bud holes.
The production process is simplified, the production cost is reduced, the thin steel on the lower die is prone to breakage, and the convenience and tightening ability of the fastener are improved.
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Abstract
Description
Technical Field
[0001] The present application relates to the field of locking connections, and in particular to a locking structure, a fastener and a display device. Background Art
[0002] In traditional fastener assembly, when it comes to the connection of metal sheets, threaded holes are usually designed on the sheets to achieve screw fixation, which is often done by tapping and threading the metal sheets.
[0003] However, when the threaded hole is close to the folded edge, the lower die needs to support the edge of the threaded hole and form a clearance hole corresponding to the threaded hole, which also causes thin steel to be formed at the edge of the clearance hole of the lower die. During the sprouting process, the thin steel material is not thick enough, so it cannot withstand the shear force generated by the flanging process and breaks, which requires frequent mold replacement, greatly increasing production costs. Summary of the invention
[0004] The purpose of the present application is to provide a locking structure, a fastener and a display device, which can simplify the production process and reduce the production cost.
[0005] To achieve the above-mentioned purpose, the present application provides a locking structure on one hand, the locking structure comprising at least a fastener, a first element and a second element, wherein the fastener comprises a screw head, and a locking section and a tapping section extending in sequence from the screw head along a first direction, the circumferential surfaces of the locking section and the tapping section are provided with a double-thread thread extending continuously from the tapping section to the locking section, and the tapping section gradually converges inward while extending in the first direction; the first element has a reserved hole, the diameter of the reserved hole is larger than the major diameter of the tapping section and smaller than the major diameter of the tapping section. The second element has a clearance hole, the diameter of which is larger than the major diameter of the locking section, and the projection of the screw head on the second element along the first direction is at least partially located outside the clearance hole, so that when the locking section at least partially passes through the clearance hole and engages and locks with the internal thread, the screw head presses against the second element to lock the first element and the second element.
[0006] The technical solution provided by the present application is that the fastener includes a locking section and a tapping section. The fastener has both tapping and locking functions. When the fastener connects the first component and the second component, as the fastener rotates and extends, the tapping section of the fastener can tap into the reserved hole of the first component and form a threaded hole on the inner wall surface of the reserved hole. Subsequently, the locking section of the fastener is screwed into the threaded hole and meshes with the threaded hole to achieve locking, thereby completing the tapping and locking operations in one tightening operation. In this way, there is no need to form a flanging budding hole on the first component in advance by budding and tapping, thereby changing and simplifying the entire production process and reducing production costs. Accordingly, since there is no need for a budding process, the problem of thin steel formed on the lower die being easy to break when using the budding process in the related art is also solved, resulting in increased costs.
[0007] Furthermore, the diameter of the reserved hole is larger than the major diameter of the tapping section, and since the major diameter of the tapping section gradually decreases along the first direction from the locking section, that is, the opening of the reserved hole is larger than the end of the tapping section away from the locking section. In this way, when locking, the fastener is easily aligned with the reserved hole, thereby facilitating the fastener to be inserted into the reserved hole, so as to facilitate the tapping operation on the inner wall of the reserved hole. In addition, in the initial stage of tapping, the portion of the tapping section that is smaller than the diameter of the reserved hole can be located in the reserved hole to prevent the problem of the fastener slipping out during the tapping process, further improving the convenience of fastener locking.
[0008] Optionally, the reserved hole is a through hole.
[0009] Through the above scheme, during tapping, it is possible to avoid the formation of a closed chamber in the reserved hole, which would cause excessive pressure in the closed chamber and hinder the downward movement of the fastener, and the debris generated during the tapping process can also be discharged through the reserved hole to avoid affecting the locking operation.
[0010] Optionally, the reserved hole is a blind hole.
[0011] Through the above solution, when the fastener is locked in the blind hole, the locking part of the fastener can be hidden, thereby improving the aesthetics.
[0012] Optionally, the length of the tapping section is 2-2.5 times the depth of the reserved hole; the length of the locking section is greater than the sum of the depths of the reserved hole and the clearance hole.
[0013] Through the above scheme, the tapping section can have a sufficient length, and the tapping section can cut thicker inner wall materials within a longer distance, so as to be gradually locked into the reserved hole, reduce the tapping torque, and facilitate the tapping operation.
[0014] Optionally, the minor diameter of the locking section is D, and the diameter of the reserved hole is d, wherein 0.05mm≤dD≤0.1mm.
[0015] Through the above scheme, it can be ensured that the double-line thread on the locking section can be locked into the reserved hole during the locking process, and after the locking is completed, the material squeezed in the reserved hole can fill the gap between the double-line thread on the locking section and the internal thread of the reserved hole, thereby improving the fastening ability.
[0016] Optionally, the minimum diameter of the tapping section is A, where 0.5 mm ≤ DA ≤ 1.5 mm.
[0017] Through the above solution, the minimum diameter of the tapping section is smaller than the diameter of the reserved hole, ensuring that the tapping section can easily enter the reserved hole, thereby facilitating the locking operation.
[0018] Optionally, the helix angle of the double-thread is in the range of 6°-8°; the hardness of the fastener is in the range of 450HV-550HV.
[0019] Through the above scheme, the inclination of the double thread can be made larger, thereby reducing the friction between the double thread and the inner wall of the reserved hole during tapping, making it easier for the double thread to tap into the reserved hole to form an internal thread pattern, and reducing the possibility of slippage. In addition, the hardness of the fastener is improved, and the service life of the fastener is extended.
[0020] Optionally, at least one protruding piece is provided on one side of the screw head located at the locking section, and the protruding piece extends along the first direction.
[0021] Optionally, the protruding member rotates and tilts toward a preset rotation direction while extending along the first direction, and the preset rotation direction is the same as or opposite to the locking rotation direction of the fastener.
[0022] Through the above scheme, the convex part can be used as a scraper. When the convex part rotates together with the tightening operation of the fastener, the convex part can scrape off the appearance treatment layer of the second element close to the screw head, so that the first element can be connected with the second element by the fastener to solve the problem of electromagnetic radiation. And / or, the convex part can also be used as an anti-loosening part. When the convex part rotates together with the tightening operation of the fastener, the convex part can be pressed into and stuck on the side of the second element close to the screw head, thereby hindering the relative movement of the first element and the second element and playing an anti-loosening role.
[0023] To achieve the above-mentioned purpose, the present application further provides a fastener on the other hand, which is used to lock a first component with a reserved hole and a second component with a makeshift hole, and the fastener at least includes a screw head, and a locking section and a tapping section extending sequentially from the screw head along a first direction; the circumferential surfaces of the locking section and the tapping section are provided with double-line threads extending continuously from the tapping section to the locking section, and the tapping section gradually converges inward while extending in the first direction; wherein the reserved hole is a through hole, and the length of the tapping section is 2-2.5 times the depth of the reserved hole.
[0024] The technical solution provided by the present application can provide a fastener with both tapping and locking functions, and facilitates the tapping operation of the fastener.
[0025] To achieve the above-mentioned purpose, the present application further provides a display device on the other hand, wherein the display device includes the above-mentioned locking structure, wherein the first element is a frame and the second element is a back cover.
[0026] The technical solution provided in this application can facilitate the connection between the frame and the back cover of the display device and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0028] Figure 1 It is a half-section schematic diagram of the budding process in the related art;
[0029] Figure 2 is a half-section schematic diagram of a locking structure in an embodiment provided in the present application;
[0030] Figure 3 yes Figure 2 A magnified schematic diagram of part A;
[0031] Figure 4 It is a schematic diagram of the structure of a fastener in an embodiment provided by the present application.
[0032] Description of reference numerals:
[0033] 110, threaded hole; 120, lower die; 121, clearance hole; 122, thin steel;
[0034] 200, fastener; 210, screw head; 211, external protrusion; 220, locking section; 230, tapping section; 240, double-threaded;
[0035] 300, first component; 310, reserved hole;
[0036] 400, second component; 410, clearance hole. DETAILED DESCRIPTION
[0037] To make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Terms such as "upper", "above", "lower", "below", "first end", "second end", "one end", "the other end" used in the present application to represent spatial relative positions are used to describe the relationship between a unit or feature as shown in the accompanying drawings relative to another unit or feature for the purpose of convenience of explanation. Terms of spatial relative position may be intended to include different orientations of the device in use or work other than the orientation shown in the figure. For example, if the device in the figure is turned over, the unit described as being "below" or "below" other units or features will be located "above" other units or features. Therefore, the exemplary term "below" can encompass both the above and below orientations. The device can be oriented in other ways (rotated 90 degrees or other orientations), and the spatially related descriptors used herein are interpreted accordingly.
[0038] In addition, the terms "installed", "set", "provided with", "connected", "slidingly connected", "fixed", and "sleeved" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0039] In traditional fastener assembly, when it comes to the connection of metal sheets, threaded holes are usually designed on the sheet to achieve screw fixation. This process is often completed through the stamping and tapping process of the metal sheet. First, the metal sheet is punched and punched with a die, and then the holes are tapped (tapping) to create internal threads on the metal sheet that match the screws. In this way, screws with standard threads can be used for a secure connection.
[0040] However, for example Figure 1In the sprouting process shown, the threaded hole 110 is located at the folded edge. In order to meet the support requirements, the lower mold 120 needs to be supported on the edge of the threaded hole 110 and form a clearance hole 121 corresponding to the threaded hole 110. This will result in the lower mold 120 being located at the edge of the clearance hole 121 and forming thin steel 122 (thinner steel). In the sprouting process, the thin steel 122 is not thick enough and cannot withstand the shear force generated by the flanging process and breaks, which requires frequent mold replacement, greatly increasing the production cost.
[0041] Moreover, it is understandable that the production process of boards with flanging holes requires two production processes, namely, flanging and tapping, which undoubtedly increases the production time of the boards, reduces production efficiency, and as the number of processes increases, the production cost of the boards also increases accordingly.
[0042] Based on this, the inventor of the present application has changed the existing structure of the screw to make it have both tapping and locking functions. In this way, when connecting the plates, it is only necessary to tap the plates with the screws to form threaded holes on the plates and lock them with the plates at the same time, thereby changing the entire production process. There is no need to form flanging holes on the plates by tapping and threading in advance, simplifying the production process and reducing production costs. Accordingly, since there is no need for the tapping process, the problem of thin steel formed on the lower die being easy to break, which leads to increased costs, is also solved.
[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in this application are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.
[0044] The present application provides a locking structure, which is used to lock two components to each other to prevent the two components from rotating or moving. The locking structure can be applied to the mutual connection of two components in a display device, such as the mutual connection of a frame and a back cover, or the mutual connection of a bracket and a frame. Of course, the locking structure can also be applied to other devices, and the present application does not specifically limit this.
[0045] Specifically, Figures 2 to 4As shown, in an achievable embodiment, the locking structure may at least include a fastener 200, and a first element 300 and a second element 400 locked by the fastener 200. The fastener 200 may include a screw head 210, which serves as an operating end, and a user tightens or loosens the fastener 200 through the screw head 210. The fastener 200 may also include a locking section 220 and a tapping section 230, which extend sequentially from the screw head 210 along a first direction. In other words, the tapping section 230 is located at one end of the locking section 220 away from the screw head 210. Double-line threads 240 are provided on the circumferential surfaces of the locking section 220 and the tapping section 230, and the double-sided threads 240 extend continuously from the tapping section 230 to the locking section 220, and the tapping section 230 gathers inward while extending in the first direction. In this way, when fastener 200 is used for locking, tapping section 230 can contact the component before locking section 220, so that tapping section 230 can use the double-line thread thereon to cut and form a threaded hole on the component, and then the locking section 220 can use the double-line thread thereon to lock and connect with the threaded hole.
[0046] It should be noted that the double-thread thread 240 on the locking section 220 and the tapping section 230 of the present application is continuous without interruption or step difference, which can avoid the fastener 200 having an obvious step difference in the two stages of locking and tapping, or in other words, avoid the user needing to adjust the locking section 220 so that it can be locked into the threaded hole when the locking section 220 is connected to the threaded hole formed by tapping of the tapped section 230, thereby speeding up the assembly speed and reducing the assembly time.
[0047] In practical applications, the locking section 220 is constructed as a cylinder, and the tapping section 230 can be constructed as a truncated cone or a cone. The double-thread 240 refers to a thread type having two mutually parallel thread lines, and the double-thread can cover the entire circumference of the tapping section 230 and the locking section 220, and it can also leave a predetermined spacing at one end of at least one of the tapping section 230 and the locking section 220.
[0048] The double thread 240 may be a triangular bud thread, a rectangular bud thread, a trapezoidal bud thread or a sawtooth bud thread. Preferably, the double thread 240 is a triangular bud thread, which is easy to lock into the component by taking advantage of the characteristics of the triangular bud thread having a sharp front end and a small contact area.
[0049] The first element 300 may be used as one of the locking element and the locked element, and the second element 400 may be used as the other of the locking element and the locked element.
[0050] Taking the first element 300 as a locking member and the fastener 200 being threadedly connected as an example, in a feasible implementation, the first element 300 may have a reserved hole 310, the diameter of which is larger than the major diameter of the tapping section 230, and since the major diameter of the tapping section 230 gradually decreases along the first direction from the locking section 220, that is, the opening of the reserved hole 310 is larger than the end of the tapping section 230 away from the locking section 220. In this way, during the locking, the fastener 200 is easily aligned with the reserved hole 310, so that the fastener 200 is conveniently inserted into the reserved hole 310, so as to facilitate the tapping operation on the inner wall of the reserved hole 310. In addition, in the initial stage of tapping, the portion of the tapping section 230 that is smaller than the diameter of the reserved hole 310 can be located in the reserved hole 310 to prevent the fastener 200 from slipping out during the tapping process, further improving the convenience of locking the fastener 200.
[0051] It can be understood that the diameter of the reserved hole 310 is larger than the partial major diameter of the tapping section 230, which means that the diameter of the reserved hole 310 is smaller than the other partial major diameter of the tapping section 230, and the diameter of the reserved hole 310 is also smaller than the major diameter of the locking section 220. In this way, as the tapping section 230 rotates and extends into the reserved hole 310, the other part of the tapping section 230 can be cut on the inner wall of the reserved hole 310 to form an internal thread, and the locking section 220 is engaged and locked with the internal thread.
[0052] Among them, the tapping section 230 cuts the inner wall of the reserved hole 310 to form an internal thread that can completely match the double-thread 240 on the locking section 220, so that the locking section 220 can be easily locked and meshed with the internal thread. In another optional embodiment, the size of the internal thread cut by the tapping section 230 on the inner wall of the reserved hole 310 can be slightly smaller than the size of the double-thread 240 on the locking section 220, that is, the internal thread and the double-thread 240 on the locking section 220 are interference-connected. In this way, when the locking section 220 and the threaded hole formed by the tapping section 230 are locked, the locking section 220 can use the double-thread 240 on it to squeeze the material on the inner wall of the threaded hole again, so that the inner wall of the threaded hole and the double-thread 240 on the locking section 220 are completely in close contact after being squeezed, thereby improving the fastening ability of the fastener 200 to the first element 300.
[0053] The second element 400 is a locked part, and the second element 400 has a clearance hole 410, the diameter of which is larger than the major diameter of the locking section 220, so that the locking section 220 and the tapping section 230 can pass through the clearance hole 410. In addition, the projection of the screw head 210 on the second element 400 along the first direction is at least partially located outside the clearance hole 410. When the locked section 220 at least partially passes through the clearance hole 410 and is engaged and locked with the internal thread, the screw head 210 can press against the side of the second element 400 away from the first element 300, and the first element 300 and the second element 400 are locked together with each other in engagement and locking.
[0054] It is worth mentioning that the present application utilizes the fastener including the locking section 220 and the tapping section 230 to have both tapping and locking functions. When the fastener 200 connects the first element 300 and the second element 400, as the fastener 200 rotates and extends, the tapping section 230 of the fastener 200 can tap into the reserved hole 310 of the first element 300, and form a threaded hole on the inner wall surface of the reserved hole 310. Subsequently, the locking section 220 of the fastener 200 is screwed into the threaded hole and meshes with the threaded hole to achieve locking. In this way, there is no need to form a flanging budding hole on the first element 300 in advance by budding and tapping, thereby changing and simplifying the entire production process and reducing production costs. Accordingly, since there is no need for a budding process, the problem of thin steel formed on the lower die being easy to break when using the budding process in the related art is also solved, resulting in increased costs.
[0055] In a feasible implementation, the reserved hole 310 can be constructed as a through hole, that is, the reserved hole 310 passes through the first element 300. During tapping, it is possible to avoid the formation of a closed chamber in the reserved hole 310, which would cause excessive pressure in the closed chamber and hinder the fastener 200 from moving downward, and the debris generated during the tapping process can also be discharged through the reserved hole 310 to avoid affecting the locking operation.
[0056] In another optional embodiment, the reserved hole 310 may also be a blind hole. In this way, when the fastener 200 is locked in the blind hole, the locking part of the fastener 200 can be hidden to improve the aesthetics.
[0057] The reserved hole 310 of the present application is preferably a through hole, and the following description will be made accordingly.
[0058] If the length of the tapping section 230 is too short, the tapping section 230 needs to cut the thicker inner wall material within a short distance during tapping, so a larger tapping torque is required to tap, and tapping is more difficult. To this end, in a feasible implementation, the length of the tapping section 230 can be 2-2.5 times the depth of the reserved hole 310. In this way, the tapping section 230 can have a sufficient length, and the tapping section 230 can cut the thicker inner wall material within a longer distance, so as to gradually lock into the reserved hole 310, reduce the tapping torque, and facilitate the tapping operation.
[0059] In an achievable implementation, the length of the locking section 220 can be greater than the sum of the depths of the reserved hole 310 and the clearance hole 410. In this way, when the fastener 200 extends into the reserved hole 310 through the clearance hole 410, it can be ensured that the internal threads on the reserved hole 310 can all be locked with the double-thread threads 240 on the locking section 220, thereby improving the locking stability.
[0060] In another optional embodiment, the length of the locking section 220 can also be less than the sum of the depths of the reserved hole 310 and the clearance hole 410, and greater than the depth of the clearance hole 410. In this way, the double-thread thread 240 on the locking section 220 can also be locked with the internal thread on the reserved hole 310.
[0061] like Figure 4 As shown, in an achievable implementation, the minor diameter of the locking section 220 is D, and the diameter of the reserved hole 310 is d, wherein 0.05 mm ≤ dD ≤ 0.1 mm. In this way, it can be ensured that the double thread 240 on the locking section 220 can be locked in the reserved hole 310 during the locking process, and the material squeezed in the reserved hole 310 after the locking is completed can be filled in the gap between the double thread 240 on the locking section 220 and the internal thread of the reserved hole 310, thereby improving the fastening ability.
[0062] It should be noted that the major diameter defined in this application refers to the diameter of the widest part of the thread, that is, the top diameter; the minor diameter refers to the diameter of the narrowest part of the thread, that is, the root diameter.
[0063] In an achievable implementation, the minimum diameter of the tapping section 230 is A, where 0.5 mm ≤ DA ≤ 1.5 mm. This means that the minimum diameter of the tapping section 230 is smaller than the diameter of the reserved hole 310, ensuring that the tapping section 230 can easily enter the reserved hole 310, thereby facilitating the locking operation.
[0064] In an achievable implementation, the helix angle of the double thread 240 is in the range of 6°-8°. Preferably, the helix angle of the double thread 240 is 7°. Compared with the helix angle of the thread of a conventional screw of about 3°, the helix angle of the double thread 240 of the present application is larger, that is, the slope of the thread is larger, thereby reducing the friction between the double thread 240 and the inner wall of the reserved hole 310 during tapping, making it easier for the double thread 240 to tap into the reserved hole 310 to form an internal thread pattern, and reducing the possibility of slippage.
[0065] At the same time, since the fastener 200 has both tapping and locking functions, in order to avoid damage to the fastener 200 during operation, the present application sets the hardness range of the fastener 200 to 450HV-550HV to increase the hardness of the fastener 200 and extend the service life of the fastener 200.
[0066] Please see again Figure 4 As shown, in an achievable embodiment, the screw head 210 is provided with at least one protruding part 211 on one side of the locking section 220, and the protruding part 211 extends along the first direction. When the fastener 200 is tightened, the protruding part 211 can rotate along with the fastener 200.
[0067] In an achievable implementation, the convex part 211 can be used as a scraper. Specifically, since the convex part 211 is connected to the side of the screw head 210 located at the locking section 220, when the convex part 211 rotates together with the fastener 200 during the tightening operation, the convex part 211 can scrape the appearance treatment layer of the second element 400 near the screw head 210, so that the first element 300 can be connected to the second element 400 through the fastener 200 to solve the problem of electromagnetic radiation.
[0068] In practical applications, the convex part 211 can be constructed as a triangular structure, and the tip of the convex part 211 is arranged away from the screw head 210, so that the appearance treatment layer can be scraped off by using the tip of the convex part 211.
[0069] Furthermore, the tip of the convex part 211 can also be inclined toward a preset rotation direction, which is the same as the locking rotation direction of the fastener 200. For example, when the double-thread 240 is a right-hand thread, the locking rotation direction of the fastener 200 is clockwise, and the tip of the convex part 211 rotates clockwise, so that the convex part 211 can scrape off the appearance treatment layer during the tightening process. There can also be multiple convex parts 211, and the multiple convex parts 211 are arranged in a circular array along the axis of the locking section 220.
[0070] In another achievable implementation, the outer protrusion 211 can also be used as an anti-loosening member. Specifically, since the outer protrusion 211 is connected to the side of the screw head 210 located at the locking section 220, when the outer protrusion 211 rotates together with the fastener 200 during the tightening operation, the outer protrusion 211 can be pressed into and stuck on the side of the second element 400 near the screw head 210, thereby hindering the relative movement of the first element 300 and the second element 400, and playing an anti-loosening role.
[0071] In practical applications, the protruding member 211 can be constructed as a triangular structure, and the tip of the protruding member 211 is arranged away from the screw head 210, so that the tip of the protruding member 211 is pressed into and stuck on the side of the second element 400 close to the screw head 210.
[0072] Furthermore, the tip of the convex part 211 can also be inclined toward a preset rotation direction, which is opposite to the locking rotation direction of the fastener 200. For example, when the double-thread 240 is a right-hand thread, the locking rotation direction of the fastener 200 is clockwise, and the tip of the convex part 211 rotates counterclockwise, so that when the convex part 211 is pressed into and stuck on the side of the second element 400 close to the screw head 210, it can hinder the fastener 200 from rotating counterclockwise, thereby playing a role in preventing loosening. There can also be multiple convex parts 211, and the multiple convex parts 211 are arranged in a circular array along the axis of the locking section 220.
[0073] Based on the same inventive concept, the present application also provides a fastener 200, which is used to lock a first element 300 having a reserved hole 310 and a second element 400 having a clearance hole 410. The fastener 200 at least includes a screw head 210, and a locking section 220 and a tapping section 230 extending in sequence from the screw head 210 along a first direction. The circumferential surfaces of the locking section 220 and the tapping section 230 are provided with a double-thread thread 240 extending continuously from the tapping section 230 to the locking section 220, and the tapping section 230 gradually gathers inward while extending in the first direction. Among them, the reserved hole 310 is a through hole, and the length of the tapping section 230 is 2-2.5 times the depth of the reserved hole 310.
[0074] It should be pointed out that the specific structures of the fastener 200 , the first element 300 and the second element 400 can refer to the above-mentioned contents and will not be described in detail here.
[0075] Based on the same inventive concept, the present application also provides a display device, which includes the above-mentioned locking structure, wherein the first element 300 is a frame and the second element 400 is a back cover. That is, the connection between the frame and the back cover in the display device adopts the connection method of the above-mentioned locking structure.
[0076] It should be pointed out that the specific structure of the locking structure can be referred to the above-mentioned contents and will not be repeated here.
[0077] It can be seen that the technical solution provided by the present application is that the fastener includes a locking section and a tapping section. The fastener has both tapping and locking functions. When the fastener connects the first element to the second element, as the fastener rotates and extends, the tapping section of the fastener can tap into the reserved hole of the first element and form a threaded hole on the inner wall surface of the reserved hole. Subsequently, the locking section of the fastener is screwed into the threaded hole and meshes with the threaded hole to achieve locking. In this way, there is no need to form a flanging budding hole on the first element in advance by budding and tapping, thereby changing and simplifying the entire production process and reducing production costs. Accordingly, since there is no need for a budding process, the problem of thin steel formed on the lower die being easy to break when using the budding process in the related art is also solved, resulting in increased costs.
[0078] Furthermore, the diameter of the reserved hole is larger than the major diameter of the tapping section, and since the major diameter of the tapping section gradually decreases along the first direction from the locking section, that is, the opening of the reserved hole is larger than the end of the tapping section away from the locking section. In this way, when locking, the fastener is easily aligned with the reserved hole, thereby facilitating the fastener to be inserted into the reserved hole, so as to facilitate the tapping operation on the inner wall of the reserved hole. In addition, in the initial stage of tapping, the portion of the tapping section that is smaller than the diameter of the reserved hole can be located in the reserved hole to prevent the problem of the fastener slipping out during the tapping process, further improving the convenience of fastener locking.
[0079] Furthermore, the reserved hole is a through hole. In this way, during tapping, it is possible to avoid the formation of a closed chamber in the reserved hole, which would cause excessive pressure in the closed chamber and hinder the fastener from moving downward, and the debris generated during the tapping process can also be discharged through the reserved hole to avoid affecting the locking operation.
[0080] Furthermore, the minor diameter of the locking section is D, and the diameter of the reserved hole is d, wherein 0.05mm≤dD≤0.1mm, which can ensure that the double-line thread on the locking section can be locked in the reserved hole during the locking process, and that the material squeezed in the reserved hole after the locking is completed can fill the gap between the double-line thread on the locking section and the internal thread of the reserved hole, thereby improving the fastening ability.
[0081] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A locking structure, characterized in that: The locking structure at least comprises a fastener (200), a first element (300) and a second element (400), wherein: The fastener (200) comprises a screw head (210), and a locking section (220) and a tapping section (230) extending in sequence from the screw head (210) along a first direction, and a double-thread thread (240) extending continuously from the tapping section (230) to the locking section (220) is provided on the circumferential surfaces of the locking section (220) and the tapping section (230), and the tapping section (230) gradually gathers inwards while extending in the first direction; The first element (300) has a reserved hole (310), the diameter of which is larger than the major diameter of part of the tapping section (230) and smaller than the major diameter of the locking section (220), so that the tapping section (230) cuts an internal thread on the inner wall of the reserved hole (310), and the locking section (220) is meshed and locked with the internal thread; The second element (400) has a clearance hole (410), the diameter of which is larger than the major diameter of the locking section (220), and the projection of the screw head (210) on the second element (400) along the first direction is at least partially located outside the clearance hole (410), so that when the locking section (220) at least partially passes through the clearance hole (410) and engages and locks with the internal thread, the screw head (210) presses against the second element (400) to lock the first element (300) and the second element (400).
2. The locking structure according to claim 1, characterized in that: The reserved hole (310) is a through hole.
3. The locking structure according to claim 1, characterized in that: The reserved hole (310) is a blind hole.
4. The locking structure according to claim 2, characterized in that: The length of the tapping section (230) is 2-2.5 times the depth of the reserved hole (310); The length of the locking section (220) is greater than the sum of the depths of the reserved hole (310) and the clearance hole (410).
5. The locking structure according to any one of claims 1 to 4, characterized in that: The minor diameter of the locking section (220) is D, and the diameter of the reserved hole (310) is d, wherein 0.05 mm ≤ dD ≤ 0.1 mm.
6. The locking structure according to claim 5, characterized in that: The minimum diameter of the tapping section (230) is A, wherein 0.5 mm ≤ DA ≤ 1.5 mm.
7. The locking structure according to claim 1, characterized in that: The helix angle of the double thread (240) is in the range of 6°-8°; The hardness of the fastener (200) ranges from 450HV to 550HV.
8. The locking structure according to claim 1, characterized in that: The screw head (210) is provided with at least one protruding part (211) on one side of the locking section (220), and the protruding part (211) extends along the first direction.
9. The locking structure according to claim 8, characterized in that: The protruding part (211) is rotated and tilted toward a preset rotation direction while extending along the first direction, and the preset rotation direction is the same as or opposite to the locking rotation direction of the fastener (200).
10. A fastener, characterized in that: The fastener is used to lock a first element (300) having a reserved hole (310) and a second element (400) having a clearance hole (410), and the fastener at least comprises a screw head (210), and a locking section (220) and a tapping section (230) extending sequentially from the screw head (210) along a first direction; A double-thread thread (240) is provided on the circumferential surfaces of the locking section (220) and the tapping section (230) and extends continuously from the tapping section (230) to the locking section (220), and the tapping section (230) gradually converges inwards while extending in the first direction; The reserved hole (310) is a through hole, and the length of the tapping section (230) is 2-2.5 times the depth of the reserved hole (310).
11. A display device, characterized in that: The display device comprises the locking structure according to any one of claims 1 to 9, wherein the first element (300) is a frame and the second element (400) is a back cover.